A five-DOF lens face adjusting apparatus belongs to the optical lens face installing and adjusting field. The apparatus is provided to solve the problems in the prior art that reflectors with superhigh reflectivity have high installing precision requirements and are difficult to install and adjust. The apparatus comprises a fixed installing base, directional position adjusting benches, an angular adjustment bench, a lens installing bench and a lens. The fixed installing base, the directional position adjusting benches, the angular adjustment bench and the lens installing bench are sequentially arranged in a coaxial way. The angular adjustment bench is arranged on one position adjusting bench through movable angular adjustment mechanisms. When light is adjusted to pass through the lens face center, the position adjustment and the angular adjustment of the lens face are independent of each other. The apparatus with high installing precision requirements is simple to install and adjust. After the lens face is fixed, a contact with the lens is not required during an adjusting process. The lens face is thus well protected.